National Route 3 (Argentina)

Ruta Nacional 3 ("National Route 3") is an Argentine highway on that runs north-south on the eastern side of the country, between the capital and the southernmost part of the country. It starts at Avenida General Paz (A001) in Buenos Aires, crosses the provinces of Buenos Aires, Río Negro, Chubut, Santa Cruz, ending at the bridge over Lapataia River in Tierra del Fuego. It is 3,045 kilometres (1,892 mi) long.

The road is interrupted between km 2674 and 2696 by the Magellan Strait, which forces access between Santa Cruz and Tierra del Fuego Provinces through Chile, over Ruta CH-255 and Ruta CH-257, paved 57 kilometres (35 mi) north of the strait and paved and treated 148 kilometres (92 mi) south of it. The Magellan Strait itself is crossed by a ferry where it is 4.65 kilometres (2.89 mi) wide, taking twenty minutes.

National Decree 1931 of 3 August 1983 named the part of the road south of National Route 22 (starting at km marker 719) Comandante Luis Piedrabuena.